[clang] [clang][Sema] Diagnose exceptions only in non-dependent context in discarded `try/catch/throw` blocks (PR #139859)

[Erich Keane via cfe-commits]

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@@ -9162,6 +9162,8 @@ StmtResult TreeTransform<Derived>::TransformCXXTryStmt(CXXTryStmt *S) {
     Handlers.push_back(Handler.getAs<Stmt>());
   }
 
+  getSema().DiagnoseExceptionUse(S->getTryLoc(), /* IsTry */ true);
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erichkeane wrote:

```suggestion
  getSema().DiagnoseExceptionUse(S->getTryLoc(), /* IsTry=*/ true);
```

https://github.com/llvm/llvm-project/pull/139859